Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken Wednesday, September 19, 2017 Guiseppe Barranco/The Enterprise

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken Wednesday, September 19, 2017 Guiseppe Barranco/The Enterprise

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken Wednesday, September 19, 2017 Guiseppe Barranco/The Enterprise

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken Wednesday, September 19, 2017 Guiseppe Barranco/The Enterprise

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken Wednesday, September 19, 2017 Guiseppe Barranco/The Enterprise

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken Wednesday, September 19, 2017 Guiseppe Barranco/The Enterprise

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken Wednesday, September 19, 2017 Guiseppe Barranco/The Enterprise

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken Wednesday, September 19, 2017 Guiseppe Barranco/The Enterprise

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken Wednesday, September 19, 2017 Guiseppe Barranco/The Enterprise

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken Wednesday, September 19, 2017 Guiseppe Barranco/The Enterprise

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken Wednesday, September 19, 2017 Guiseppe Barranco/The Enterprise

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken Wednesday, September 19, 2017 Guiseppe Barranco/The Enterprise

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken Wednesday, September 19, 2017 Guiseppe Barranco/The Enterprise

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken

Black smoke rises from a storage tanker at the Valero facility in Port Arthur, Texas on Friday. Several onlookers stop to photograph the site. Photo taken Wednesday, September 19, 20187 Guiseppe Barranco/The Enterprise

Black smoke rises from a storage tanker at the Valero facility in Port Arthur, Texas on Friday. Several onlookers stop to photograph the site. Photo taken Wednesday, September 19, 20187 Guiseppe Barranco/The

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken Wednesday, September 19, 2017 Guiseppe Barranco/The Enterprise

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken Wednesday, September 19, 2017 Guiseppe Barranco/The Enterprise

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken Wednesday, September 19, 2017 Guiseppe Barranco/The Enterprise

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken Wednesday, September 19, 2017 Guiseppe Barranco/The Enterprise

Smoke and fire rise from a heavy oil tank at Valero's Port Arthur facility on Wednesday. No injuries were reported in the incident. Area residents were asked to shelter in place by city officials. Photo taken

Black smoke rises from a storage tanker at the Valero facility in Port Arthur, Texas on Friday. A team of workers can be seen at the bottom of the photo. Photo taken Wednesday, September 19, 20187 Guiseppe Barranco/The Enterprise

Black smoke rises from a storage tanker at the Valero facility in Port Arthur, Texas on Friday. A team of workers can be seen at the bottom of the photo. Photo taken Wednesday, September 19, 20187 Guiseppe

Black smoke rises from a storage tanker at the Valero facility in Port Arthur, Texas on Friday. A team of workers can be seen at the bottom of the photo. Photo taken Wednesday, September 19, 20187 Guiseppe Barranco/The Enterprise

Black smoke rises from a storage tanker at the Valero facility in Port Arthur, Texas on Friday. A team of workers can be seen at the bottom of the photo. Photo taken Wednesday, September 19, 20187 Guiseppe

Black smoke rises from a storage tanker at the Valero facility in Port Arthur, Texas on Friday. A team of workers can be seen at the bottom of the photo. Photo taken Wednesday, September 19, 20187 Guiseppe Barranco/The Enterprise

Black smoke rises from a storage tanker at the Valero facility in Port Arthur, Texas on Friday. A team of workers can be seen at the bottom of the photo. Photo taken Wednesday, September 19, 20187 Guiseppe

Valero spokeswoman Barbara Phillips said in a statement that the fire, which started at about 11:50 a.m., was in a heavy oil tank.

PREVIOUS REPORT: The Port Arthur Fire Department is responding to reports of a fire at the Valero refinery, which seems to have destroyed one large storage tank.

The city is asking residents on the west side of Port Arthur to shelter in place.

Valero spokeswoman Lillian Riojas confirmed that a fire had been reported at the refinery. "Valero's emergency response teams are on scene," Riojas said in an email. "Valero has contacted local authorities and are cooperating with agencies.

"Our primary concern is for safety of workers and community."

There are no reported injuries and all employees have been accounted, Riojas said.

The Port Arthur refinery had been shut down due to Hurricane Harvey, which dumped large amounts of rain in the city, causing flooding there and at the refinery.

Valero's CEO Joe Gorder said Thursday that the refinery was working at 40 percent to 50 percent of its capacity.

The shelter-in-place order includes Port Arthur ISD's Memorial 9th Grade, Dowling, Lincoln, Washington and Alternative Center campuses, the district announced.

"Our district officials are monitoring the situation and are in touch with the City concerning the matter. No further details are available at this time," PAISD said. "Parents, to be clear, you cannot pick up your children at this time."